FR1021016A - Agrandisseur à correction de contraste - Google Patents

Agrandisseur à correction de contraste

Info

Publication number
FR1021016A
FR1021016A FR1021016DA FR1021016A FR 1021016 A FR1021016 A FR 1021016A FR 1021016D A FR1021016D A FR 1021016DA FR 1021016 A FR1021016 A FR 1021016A
Authority
FR
France
Prior art keywords
enlarger
corrected
contrast
corrected enlarger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
English (en)
Inventor
Henri-Emile Liabeuf
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of FR1021016A publication Critical patent/FR1021016A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/727—Optical projection devices wherein the contrast is controlled optically (e.g. uniform exposure, two colour exposure on variable contrast sensitive material)

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
FR1021016D 1950-06-27 1950-06-27 Agrandisseur à correction de contraste Expired FR1021016A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1021016T 1950-06-27

Publications (1)

Publication Number Publication Date
FR1021016A true FR1021016A (fr) 1953-02-13

Family

ID=9576693

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1021016D Expired FR1021016A (fr) 1950-06-27 1950-06-27 Agrandisseur à correction de contraste

Country Status (1)

Country Link
FR (1) FR1021016A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074313A (en) * 1960-12-27 1963-01-22 Rca Corp Photocopier apparatus
EP0000450A1 (fr) * 1977-06-03 1979-01-24 ANVAR Agence Nationale de Valorisation de la Recherche Appareils de reproduction photographique de documents transparents, notamment du type agrandisseur photographique
US8013887B2 (en) 2004-12-16 2011-09-06 Esko-Graphics Imaging Gmbh Beam illumination system and method for producing printing plates

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3074313A (en) * 1960-12-27 1963-01-22 Rca Corp Photocopier apparatus
EP0000450A1 (fr) * 1977-06-03 1979-01-24 ANVAR Agence Nationale de Valorisation de la Recherche Appareils de reproduction photographique de documents transparents, notamment du type agrandisseur photographique
US8013887B2 (en) 2004-12-16 2011-09-06 Esko-Graphics Imaging Gmbh Beam illumination system and method for producing printing plates
EP1674931B1 (fr) * 2004-12-16 2015-07-22 Esko-Graphics Imaging GmbH Système d'exposition et procédé de production de plaques d'impression

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